Radar Help!!

[svsanuk]

This may not be an issue, but maybe it is - Today I was running down wires while getting ready to install an autopilot. While testing wires, noting what wires power which units, I noticed remnant current in the power wires to the radar after the radar was turned off. Note: At no point had I turned on the power at the radar head (nor the scanner), just the distribution panel switch for the radar.

It seems the radar holds some power, only a volt and a half, and feeds it back to the system.. but since the panel switch is off it has nowhere to go?

When I disconnected the radar power leads and left only the power wires from the panel and this did not happen.

When I reconnected the radar unit, turned it on and off again (at the panel), the current was there again.

When I turned off the battery power with the panel switch left on.. the mystery current vanished! It seemed like the current was able to escape, perhaps back to the batteries?

So it seems that the radar itself holds a little bit of current which slowly leaks back to the panel.

Is this possible? Is it a problem? The radar is an Raytheon SL70, and it works fine.

[senormechanico]

Probably a capacitor in the radar's power supply.
Don't worry about it.

[svsanuk]

Ok, thats what I figured. Thanks Steve!